Coffee machine



FIG. 1 is a front perspective view of a coffee machine showing my new design.

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is an opposite side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The elements presented in broken lines represent unclaimed portions of the coffee machine and form no part of the claimed design. 

CLAIM The ornamental design for a coffee machine, as shown and described. 